Not a Linux neophyte, but not much more than a shell programmer here either.

Checked out everything via git, as per the build instructions document. Cut and paste in terminal window for each step, all compiles/installs completed successfully. Problem is that when running the startup script (both from desktop, and later from terminal window), complains wdsp is a 32 bit elf version, and promptly crashes. Never does the wisdom file generation. Also, the first attempted run, it appeared wdsp wasn't in the path, even though correct path was included in path spec. I created a symbolic link one directory level above, and then it threw the 32 bit elf error. ldconfig never once complained in the whole process. So, what stupid mistake have I made? Anyone out there ever actually made a package out of pihpsdr, or maybe ghpsdr... <LOL>

The code was built for Raspian which is running in 32 bit mode. If you want to run on Kubuntu which is running the system in 64 bit mode you will have to recompile both pihpsdr and wdsp on that system.